Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (3): 030301 doi: 10.13538/j.1001-8042/nst.26.030301

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Adsorption behaviors of iodide anion on silver loaded macroporous silicas

WU Hao, WU Yan, CHEN Zi, and WEI Yue-Zhou   

  1. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Contact: WU Yan E-mail:wu_yan@sjtu.edu.cn
  • Supported by:

    Supported by National Natural Science Foundation of China (Nos. 21261140335 and 91126006) and the Scientific Research Foundation for Youth Scholars of Shanghai Jiao Tong University (No. AF0200003)

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WU Hao, WU Yan, CHEN Zi, and WEI Yue-Zhou . Adsorption behaviors of iodide anion on silver loaded macroporous silicas.Nuclear Science and Techniques, 2015, 26(3): 030301     doi: 10.13538/j.1001-8042/nst.26.030301

Abstract:

A macroporous silica-based silver loaded adsorbent was synthesized by grafting the silver complexes of thiourea (Ag(tu)3NO3) into a silica-based copolymer support (SiO2-P). The adsorbent was used to uptake iodide anions (I) by batch and column techniques. The kinetic and saturated adsorption experiments were carried out by varying the shaking times and initial concentration of I. Experimental results shown that the kinetic adsorption of I was controlled by a pseudo second order model and the saturated adsorption of I was controlled by the chemisorption mechanism, which followed a Langmuir adsorption equation. The breakthrough curve of I had a S-shaped profile. The column efficiency was estimated to be over 90%.

Key words: Iodide anion, Silver complexes of thiourea, Grafting, Macroporous silica-based support, Radioactive contaminated wastewater